Color-former
AssigneeJujo Paper Co., Ltd.
InventorsMasahiro Sakamoto, Tsutomu Murano, Shozo Harada
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Abstract
The present invention relates to a color-former having microcapsules which comprise an electron-donating colorless dye dispersed in a hydrophobic liquid. The present invention provides a color-former using both an electron-donating colorless dye and a hydrophobic liquid which previously were unable to be used because of the lack of solubility. A uniform and stable dispersion of electron-donating colorless dye in a hydrophobic core liquid is prepared by using oil-soluble non-ionic surfactant.
Claims7
A color-former mainly comprising microcapsules having a core comprising an electron-donating colorless dye and a hydrophobic liquid, said hydrophobic liquid comprising a hydrophobic solvent and an oil-soluble nonionic surfactant, said electron-donating colorless dye being dispersed in said hydrophobic liquid with an average particle diameter of 0.1 to 5 .mu.m.
Dependencies are inferred from the claim text.